Tom studies science very hard.(改为一般疑问句)
Does Tom study science very hard?
主语是第三人称单数
study 是谓语动词,句子中不缺少谓语动词,故用助动词does
I am late for school because my bike is broken .(就画线部分提问)(because my bike is broken画线)
Why are you late for school?
because 表原因
late 是形容词,句子中缺少动词,故用are
There is a picture _____my family ______the wall ______my room .
D.of,of,in